view.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Prints a particular instance of moodleoverflow
 *
 * You can have a rather longer description of the file as well,
 * if you like, and it can span multiple lines.
 *
 * @package   mod_moodleoverflow
 * @copyright 2017 Kennet Winter <k_wint10@uni-muenster.de>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

// Include config and locallib.
use mod_moodleoverflow\anonymous;
use mod_moodleoverflow\event\course_module_viewed;
use mod_moodleoverflow\output\pages\view\view_page;
use mod_moodleoverflow\review;

require_once(__DIR__ . '/../../config.php');
global $CFG, $PAGE, $DB, $OUTPUT, $SESSION, $USER;
require_once($CFG->dirroot . '/mod/moodleoverflow/locallib.php');

// Declare optional parameters.
$id = optional_param('id', 0, PARAM_INT);       // Course Module ID.
$m = optional_param('m', 0, PARAM_INT);        // MoodleOverflow ID.
$page = optional_param('page', 0, PARAM_INT);     // Which page to show.

// Set the parameters.
$params = [];
if ($id) {
    $params['id'] = $id;
} else {
    $params['m'] = $m;
}
if ($page) {
    $params['page'] = $page;
}
$PAGE->set_url('/mod/moodleoverflow/view.php', $params);

// Check for the course and module.
if ($id) {
    $cm = get_coursemodule_from_id('moodleoverflow', $id, 0, false, MUST_EXIST);
    $course = $DB->get_record('course', ['id' => $cm->course], '*', MUST_EXIST);
    $moodleoverflow = $DB->get_record('moodleoverflow', ['id' => $cm->instance], '*', MUST_EXIST);
} else if ($m) {
    $moodleoverflow = $DB->get_record('moodleoverflow', ['id' => $m], '*', MUST_EXIST);
    $course = $DB->get_record('course', ['id' => $moodleoverflow->course], '*', MUST_EXIST);
    $cm = get_coursemodule_from_instance('moodleoverflow', $moodleoverflow->id, $course->id, false, MUST_EXIST);
} else {
    throw new moodle_exception('missingparameter');
}

// Save the allowmultiplemarks setting.
$marksetting = $DB->get_record('moodleoverflow', ['id' => $moodleoverflow->id], 'allowmultiplemarks');

// Require a login.
require_login($course, true, $cm);

// Set the context.
$context = context_module::instance($cm->id);
$PAGE->set_context($context);

// Check some capabilities.
if (!has_capability('mod/moodleoverflow:viewdiscussion', $context)) {
    notice(get_string('noviewdiscussionspermission', 'moodleoverflow'));
}

// Mark the activity completed (if required) and trigger the course_module_viewed event.
$event = course_module_viewed::create(['objectid' => $PAGE->cm->instance, 'context' => $PAGE->context]);
$event->trigger();

// Print the page header.
$PAGE->set_url('/mod/moodleoverflow/view.php', ['m' => $moodleoverflow->id]);
$PAGE->set_title(format_string($moodleoverflow->name));
$PAGE->set_heading(format_string($course->fullname));
$PAGE->add_body_class('limitedwidth');

$PAGE->requires->js_call_amd('mod_moodleoverflow/topicmove', 'init');
$PAGE->requires->js_call_amd('mod_moodleoverflow/rating', 'init', [$USER->id, $marksetting->allowmultiplemarks]);

// Return here after posting, etc.
$SESSION->fromdiscussion = qualified_me();

// Output starts here.
echo $OUTPUT->header();
echo $OUTPUT->render(new view_page($moodleoverflow, $page));
echo $OUTPUT->footer();